Locating device for drill mountings



March I7,' 1931. c. c. HANSEN 96,

LOGATING DEVICE FOR DRILL MOUNTING-S Filed July '12, 1930 INVENTOR; 72m ,5 L lian/5'01:

#75 IATJORNE).

Patented Mar. 17, 1931 UNITED STATES PATENT OFFICE CHARLES C. HANSEN, 0F EASTO-N, PENNSYLVANIA, ASSIGNOR 'IO INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY A CORPORATION OF NEW JERSEY LOCATING DEVICE FOR DRILL MOUNTINGS Application filed July 12, 1930. Serial No. 467,395.

This invention relates to locating devices, but more particularly to locating devices adapted to locate a rock drill mounting with respect to the rock intended to be drilled.

()ne well known method of quarrying rock comprises drilling rows of suitably spaced drill holes and broaching the intervening walls of rock between the drill holes to form continuous cuts through the rock. The working implements employed in these operations,

namely the drillingsteel and the breaching tool, may be actuated by the same rockdrill which is preferably supported on a mounting adapted to be drawn across the surface of the rock. The mounting is usually drawn twice along the intended line of cut in the fer to similar parts,

rock to complete the cut, one trip being re quired for the drilling of the spaced drill holes and the other for the broaching opera tions.

The efliciency of this method of drilling depends to a considerable extent upon the proper spacing of the drill holes since, when the drill holes are properly spaced, the required number of operations to form the out of a desired. length will be minimized. It is an object of the present invention to assure the accurate spacing of the drill holes.

Another object of the invention is to hold the drill mounting immovable during the drilling and breaching operations.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawings illustrating the invention and in which similar reference characters re- Figure 1 is a side elevation of a locating device for rock drill mountmgs constructed in accordance with the practice of the inven- .tion and showing it applied to a rock drill vehicle mounting,

,Figure 2 1s a transverseview taken on the line 2-2 of Figure 1 looking in the direction indicated by thearrows, and

Figure 3 is a view of a detail.

Referring to the drawings, A designates the platform of a. vehicle to which are secured axles B and G carrying pairs of wheels I) (only one of each pair being shown). The vehicle maybe of a type adapted to be moved along a track laid on a quarry floor and accordingly the wheels D are shown provided with the usual flanges E for cooperation with rails F. Ties G may be interposed between the rails I and the rock floor H of the quarry. Secured to the platform A, preferably at one side thereof, is a vertical frame J which may be braced by one or more diagonal struts K. The frame J provides a guideway for a saddle L on which is secured a rock drill O. A drill steel P is shown extending into the forward end of the rock drill O and carries a cutting bit (not shown) for drilling holes Q, into the rock H. Usually the weightof the rock drill O and its associated parts is sufficient to create the necessary pressure on the cutting bitto drill the holes Q, and preferablyimeans, such as a power hoist (not shown) is operatively connected to the saddle L or the rock drill O in any convenient manner to quickly elevate the rock drill upon the completion of a hole.

To facilitate the starting of drill holes which is normally difficult due to the tendency of the cutting bit to travel over a wide area on the surface of the rock, a drill steel centralizer of any well known desi n may be employed. In the drawings, I siow a centralizcr comprising, a pair of movable arms R pivotally secured in brackets S which may be bolted or otherwise secured to the opposite sidcs of the frame J. The free ends of the arms R may be formed with re istering grooves to receive the drill steel I and may be secured togetherby a clip T.

In accordance with the present invention, means are provided for accurately spacing the drill holes Q with respect to each other. The means includes a pair of stop plates U and V seated on the rail F in posltion to arrest movement of the vehicle in either direction on the track. Preferably the stop plates U and V are disposed on opposite sides of one of the wheels D and the adjacent ends of the plates may be provided with curved bearing surfaces conforming to the contour of the bearing surfaces of the wheel D for which they form abutments.

The stop plates U and V are preferably connected by flexible means, such as a chain maximum'spacing of the stop plates U and each plate to receive the rail.

-whic'h lie at the same side of the rail. F as X, which is shown interlocked at its ends to eye bolts Y adapted to be received in the stop plates U and V. If desired, the bolts Y may be inserted through laterally extending ears Z on the plates U andV and nuts bmay be threaded on the ends of the bolts to st cure the bolts in the ears. I contemplate operat ng th reek d ll with h hi l in its limiting positi n a e m ne y h V which is afforded by the chain X and the associated connecting means to thereby effect the proper spacing of the drill holes. By ad usting the nuts I) the maximum spacing of the plates U and V and consequently, the

the fiangeE of the wheel D preferably lie flush with the rail for a portion of the length of each plate so that the surfaces WV may contact with the bearing surfaces of the wheel rather than with. the flange E.

In operation, the position of the vehicle for drilling the first hole of a series of drill holes maybe accurately determined when the position of the intended drill hole has been selected, by moving the vehicle along thetrack until the drill steel directly overlies the posi- 'tionfofsuch intended drill hole. The vehicle may be rigidly held in such position by the stop platesU and V which may be brought to bear against the opposite sides of a wheel D and clamped to the rail F by the set Screws (Z.

Upon the completion ofthe cut, and-assumingv that it is desired to drill the SBCQnCl hole of the series to the right of the first hole as viewed in Figure 1, the-setscrew cl of the stop plate V is loosened and the plate V moved along the rail F away fromthe plate U to the extremelimit allowed by the chain X. The plateV is then'clamped to the rail Ein the new position by the set screw-d. Thereafter the Vehicle may be moved to a position in which the-wheel D'will again contact with the plate V and in'the new position of the ver hicle, the rock drill Owill directly overlie the point at which it is desired to drill thenext hole. To retain the vehicle in the new posi-.

tion-the plate Umay be brought up to contact withthe opposite side of the wheel D from the plate V and secured to the rail F" by its set screw d. e I

, When the broaching of the intervening wall of rockbetween the holesQ is performed bya rock drill mounted on theframe J and equipped with a suitable broaching tool, the

stop plates U and V may again be employed to determine the position of the vehlcle for the several operations.

The position of the vehicle for the first broachingoperation may be determined by moving the vehicle along the track until the broaching tool directly overlies the lntervening wall of rock between adjacent drill holes which it isdesired to break down, andthe'po: sitions of the vehicle for the subsequent broaching operations, may be located in substantially the same manner as described above-for locating the position of the vehicle for the drilling operations.

The present invention effects a material reduction in the time required to locate the drilling apparatus for either the drilling or the broaching operations and enables even unskilledoperators to accurately space the drill holes. Since the locating device is of simple construction it may be cheaply manufactured and damaged portions thereof replaced at small expense.

I claim:

1. In a locating device for rock drill mountings, the combination with a rock drill mounting which is movable bodily over a rock surface, of a stop plate abutting the mounting for preventing movement of the mounting,

means fixed relatively to the rock surface, and means connecting thestop plate and the first said means and adapted to permit the stop plateto be moved a limited distance away from the first said means and the mounting, whereby the mounting may be moved a predetermined distance over the rock surface to again bear against the stop plate.

2, In a locating device for rock drill mountings, the combination of a rock drillmounting Which is movable bodily over a rock surface,o-f a pair of stop plates-abutting the mounting to prevent movement of the mounting'in the planeof the stop plates, and means connecting the stop plates and adapted to permit one of the stop plates to be moved a limited distance away from the other stop plate, wherebyfthe mounting may be moved a predetermined distance over the rock surface to again abut the moved stop plate.

3. In a locating device for rock drill mountings, the combination of a vehicle having supporting wheels, I a rock drill operatively mounted on the vehicle, a track to cooperate with the wheels, stop plates disposed on the track at the opposite sides of one of said wheels, and means connecting. the stop plates to determine the spacing of said stop plates with respect to each other, said spacing being of such extent that drill holes drilled by the atively mounted on the vehicle, a track to cooperate with the wheels, stop plates disposed on the track at the opposite sides of one of said wheels, and flexible means connecting the stop plates to determine the maximum spacing of said stop plates with respect to each other.

5. I11 a locating device for rock drill mountings, the combination with a vehicle supported on wheels and adapted to support a rock drill, and a track to cooperate with said wheels, of a pair of stop plates seated on the track and cooperating with the wheels to prevent movement of the vehicle along the track, and flexible means connecting the stop plates and adapted to permit one of the stop plates to be moved a limited distance along the track away from the other stop plate, whereby the vehicle may be moved a predetermined distance along the track to again abut the moved stop plate.

6. In a locating device for rock drill mountings, the combination with a vehicle supported on wheels and adapted to support a rock drill, and a track to cooperate with said wheels, of a pair of stop plates seated on the track and cooperating with the wheels to prevent movement of the vehicle along the track, and flexible means connecting the stop plates and adapted to permit one of the stop plates to be moved a limited distance along the track away from the other stop plate, whereby the vehicle may be moved a predetermined distance along the track to again abut the moved stop plate, said flexible means being adjustable to vary the maximum spacing between the stop plates.

7. In a locating device for rock drill mountings, the combination with a vehicle supported on wheels and adapted to support a rock drill, and a track comprising rails to cooperate with the wheels, of a pair of stop plates provided with slots to receive a rail and bearing surfaces to engage the Wheels for preventing movement of the vehicle along the rails, and flexible means connecting the stop plates and adapted to permit one of the stop plates to be moved a limited distance along the rail in the direction away from the other stop plate, whereby the mounting may be moved a predetermined distance along the track to again abut the moved stop plate.

8. In a locating device for rock drill mountings, the combination with a vehicle supported on wheels and adapted to support a rock drill, and a track comprising rails to cooperate with the wheels, of a pair of stop plates provided with slots to receive a rail and bearing surfaces to engage the wheels for preventing movement of the vehicle along the rails, means to detachably secure the stop l t t th rail, and flexible means connecting the stop plates and adapted to permit one of the stop plates to be moved a limited distance along the rail in the direction away from the other stop plate, whereby the vehicle may be moved a predetermined distance along the track to again abut the moved stop plate.

In testimony whereof I have signed this specification.

CHARLES C. HANSEN.

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